Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2000,2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6#ifndef __XFS_IALLOC_BTREE_H__
7#define __XFS_IALLOC_BTREE_H__
8
9/*
10 * Inode map on-disk structures
11 */
12
13struct xfs_buf;
14struct xfs_btree_cur;
15struct xfs_mount;
16struct xfs_perag;
17
18/*
19 * Btree block header size depends on a superblock flag.
20 */
21#define XFS_INOBT_BLOCK_LEN(mp) \
22 (xfs_has_crc(((mp))) ? \
23 XFS_BTREE_SBLOCK_CRC_LEN : XFS_BTREE_SBLOCK_LEN)
24
25/*
26 * Record, key, and pointer address macros for btree blocks.
27 *
28 * (note that some of these may appear unused, but they are used in userspace)
29 */
30#define XFS_INOBT_REC_ADDR(mp, block, index) \
31 ((xfs_inobt_rec_t *) \
32 ((char *)(block) + \
33 XFS_INOBT_BLOCK_LEN(mp) + \
34 (((index) - 1) * sizeof(xfs_inobt_rec_t))))
35
36#define XFS_INOBT_KEY_ADDR(mp, block, index) \
37 ((xfs_inobt_key_t *) \
38 ((char *)(block) + \
39 XFS_INOBT_BLOCK_LEN(mp) + \
40 ((index) - 1) * sizeof(xfs_inobt_key_t)))
41
42#define XFS_INOBT_PTR_ADDR(mp, block, index, maxrecs) \
43 ((xfs_inobt_ptr_t *) \
44 ((char *)(block) + \
45 XFS_INOBT_BLOCK_LEN(mp) + \
46 (maxrecs) * sizeof(xfs_inobt_key_t) + \
47 ((index) - 1) * sizeof(xfs_inobt_ptr_t)))
48
49struct xfs_btree_cur *xfs_inobt_init_cursor(struct xfs_perag *pag,
50 struct xfs_trans *tp, struct xfs_buf *agbp);
51struct xfs_btree_cur *xfs_finobt_init_cursor(struct xfs_perag *pag,
52 struct xfs_trans *tp, struct xfs_buf *agbp);
53unsigned int xfs_inobt_maxrecs(struct xfs_mount *mp, unsigned int blocklen,
54 bool leaf);
55
56/* ir_holemask to inode allocation bitmap conversion */
57uint64_t xfs_inobt_irec_to_allocmask(const struct xfs_inobt_rec_incore *irec);
58
59#if defined(DEBUG) || defined(XFS_WARN)
60int xfs_inobt_rec_check_count(struct xfs_mount *,
61 struct xfs_inobt_rec_incore *);
62#else
63#define xfs_inobt_rec_check_count(mp, rec) 0
64#endif /* DEBUG */
65
66int xfs_finobt_calc_reserves(struct xfs_perag *perag, struct xfs_trans *tp,
67 xfs_extlen_t *ask, xfs_extlen_t *used);
68extern xfs_extlen_t xfs_iallocbt_calc_size(struct xfs_mount *mp,
69 unsigned long long len);
70
71void xfs_inobt_commit_staged_btree(struct xfs_btree_cur *cur,
72 struct xfs_trans *tp, struct xfs_buf *agbp);
73
74unsigned int xfs_iallocbt_maxlevels_ondisk(void);
75
76int __init xfs_inobt_init_cur_cache(void);
77void xfs_inobt_destroy_cur_cache(void);
78
79#endif /* __XFS_IALLOC_BTREE_H__ */